Police are investigating several cars in the parking lot that were reportedly shot by Adam before he barged into the school to open fire on more than two dozen faculty and students.

One of the cars reportedly belonged to Lauren Rosseau, 30, a permanent substitute teacher at Sandy Hook Elementary School. Lauren’s classroom was the second room Adam attacked in his shooting rampage after first killing the school principal and psychologist in the front office.

The department of genetics will be working hand-in-hand with the state’s Chief Medical Examiner during the study, which will investigate whether a genetic mutation was responsible for triggering Adam’s actions that day, according to TMZ.

A representative for the medical examiner’s office says that they are not really sure what they are looking for. Results aren’t expected for several weeks.